<Window x:Class="Workspace.DockExample" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Workspace" Width="640" Height="480"> <Path Stroke="Black" StrokeThickness="1" Fill="#CCCCFF"> <Path.Data> <RectangleGeometry Rect="30,55 100 30" /> </Path.Data> </Path> </Window>